Safety-stop for elevators



I (No ModeL) J. TAYLOR.

SAFETY STOP FUR ELEVATORS.

Patnted July 23, 1895.

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JAMES TAYLOR, OF LOUISVILLE, KENTUCKY. I

SAFETY-STOPLFO R. ELEVATORS.

SPECIFICATION forming part of Letters Patent N 0. 543,359, dated July23, 1895.

Application filed January 4, 1893. Serial No. 457373. (No model.)

To all whom it may concern:

Be it known that 1, JAMES TAYLOR, a citizen of the United States,residing at Louisville, in the county of Jefierson and State ofKentucky, have invented certain new and useful Improvements inSafety-Stops for Elevators, of which the following is a specification.

This invention relates to an improvement in safety-stops for elevatorsand is illustrated in the accompanying drawings, in which Figure 1 showsa side view of part of an elevator-car with my improvement appliedthereto, and also shows the guide-rail at the side of the hatchway. Fig.2 shows a top view of the safety appliance, with the guiderail andhatchway-post in section. Fig. 3 shows an enlarged sectional view of thesafety device. Fig. 4 shows a side elevation of the safety device withthe operating mech anism therefor.

The letter A designates the side of an elevator-car, and B an uprightpost at one side of the hatchway, in which said elevator-car works, saidpost having a vertical gnide-rail O on its inner side. A guide-piece Dis secured to the elevator-car and embraces the said guide-rail O, andthis guide-piece has a wedge-shaped slideway a, on each side of theguide-rail, and lips M along the outer edge of each slideway, the smallend of this slideway being at the top end of the guide-piece. Wedges EE'fit in these slldeways between the lips M and the side of the car,with their straight sides against the sides of the guiderail 0, andthese wedges have ears b extending over the top surfaces of theguide-pieces D. Said wedges extend below the said guidepieces and arebifurcated at the lower ends to receive dogs or pawls F, which hang onpivots cc, connecting them with the said wedges, and have sharpenedprongs F at the lower end below the wedge. A spring d is seated in arecess (1 in the straight side of the wedge, with its free end inengagement With the dog F, and holds said dog in a position where itsback surface f projects from the wedge to be encountered by theguide-pieceD should the elevator-car drop, as hereinafter explained. Inits normal position the dog is of course free from the rail C.

Arod Gis attached to the ear b of the wedge E and extends to the top ofthe car, where it will be connected with a lever H, pivoted to across-beam I on the car, and said lever is connected with the draftcables or ropes K on the opposite side of its pivot to the point ofattachment of the rod G. A spring L bears on the said lever, tending topush down the end to which the ropes are attached.

As above described, it will be seen that the ear 5 forms a point ofattachment for the rod G, and also engages with the top of theguidepiece D and acts as a stop to prevent the wedge from falling downfrom between the guide-piece and the guide-rail. By making the lower endof the wedge bifurcated and locating the dog therein, anylateral movement of the lower end of the dog will be prevented. The lower ends ofthedogs are pointed and inclined inwardly and downwardly, so that assoon as they engage with the rail C the downward-movement of the carwill force them into the rail and stop the car,and by locating them uponopposite sides of the rail the engagement of the rail by one of themwill be offset or counteracted by the engagement of it by the other one,which will prevent theliability of the parts being twisted and broken,as would be the case if the strain were to come upon one side of therail only.

As long as the elevator runs regularly by the operation of the ropes,the safety-catch stands normally clear of the rail 0. Should the ropesbreak, however, the weight of the car which has been serving to holddown the lever H, and thereby preserve the normal re-.

lation of parts no longer serves such purpose, whereupon the spring Limmediately depresses the inner end of the lever, thereby raising therod G and pulling thewedge E up into the slideway a, when theguide-piece D, bearing on the back surfacefof the-dog, forces thepoint-end F of the latter into the guide-rail O,'which is of wood, andthereby instantly stops the elevator. It will be observed that thetendency of the car to fall acts to force the dog more deeply in thewood of the guide-rail.

One or more of these safety-catches will be attached on each side of theelevator-car.

Any suitable governor may be employedin connection with thesafety-catches, in place of the spring-actuated lever here shown.

The wedge E is to be employed for taking up wear by moving it fartherinto its slideway and fastening it.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The combination, with an elevator car, of a guide piece secured to oneside thereof, the inner side, or edge of said guide piece being providedwith a wedge shaped slide way, and having lips along its outer edge, awedge within the slide way between the lips and the side of the carhaving one of its sides straight, the upper end of said wedge being bentover the top of the guide piece and perforated to form an ear, and theopposite end being bifurcated and recessed on its straight side abovethe bifurcation, a dog pivotally secured within the bifurcation, thefree end of which is curved downwardly and pointed, and a spring withinthe recess, the free end of which engages with the dog below the pivotalpoint and forces the rear edge of the dog beyond the inclined face ofthe wedge, a lever on the car, one end of which is connected with thehoisting rope and a rod secured to the other end of the lever and withthe ear at the top of the wedge, substantially as set forth.

In testimony whereof I affix my signature in the presence of twowitnesses.

JAMES TAYLOR. Witnesses:

I. R. MAYNARD, NEILL BEGHTOT.

